Filtered QRS duration on signal-averaged electrocardiography correlates with ventricular dyssynchrony assessed by tissue Doppler imaging in patients with reduced ventricular ejection fraction

Tatsuya Tahara, Taiji Sogou, Chisato Suezawa, Hitoshi Matsubara, Norihiro Tada, Sho Tsushima, Tomoki Kitawaki, Ryoko Shinohata, Shozo Kusachi

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Objectives: The relationships between filtered QRS duration and ventricular dyssynchrony were studied. Methods: We measured filtered QRS duration on signal-averaged electrocardiography and analyzed tissue Doppler imaging in chronic heart failure patients with ejection fraction less than 50%. Results: In 64 patients, interventricular and intraventricular dyssynchronies were observed in 25 and 38 patients, respectively. All patients with interventricular dyssynchrony were associated with intraventricular dyssynchrony. Filtered QRS showed 0.82 and 0.78 of the area under the curve (AUC) in the receiver operating characteristic curve (ROC) for the detection of interventricular and intraventricular dyssynchrony, respectively, with 89.7% and 96.2% specificity and 52.0% and 52.6% sensitivity, with cutoff values of 174 and 153 milliseconds. Specificity and sensitivity as well as AUC were lower in the ROC of QRS duration than filtered QRS duration. Conclusion: Filtered QRS duration provided more reliable information to estimate ventricular dyssynchrony in patients with reduced ventricular ejection fraction than QRS duration did.

Original languageEnglish
Pages (from-to)48-53
Number of pages6
JournalJournal of Electrocardiology
Volume43
Issue number1
DOIs
Publication statusPublished - Jan 1 2010

Keywords

  • Electrocardiography
  • QRS
  • Ventricular dyssynchrony

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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